#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <vector>

using namespace std;

int singleNumber(vector<int>& nums) {
    int ret = 0;
    for (int i = 0; i < 32; ++i)
    {
        int sum = 0;
        for (auto e : nums)
        {
            if ((e >> i) & 1 == 1)
                sum++;
        }
        sum %= 3;
        if (sum == 1)
            ret |= (1 << i);
    }

    return ret;
}

int main()
{

	return 0;
}